The "updated" Service Menu of the AT-5555N II is a testament to the radio's flexibility, offering a level of control typically reserved for much more expensive equipment. The ability to mitigate the receive noise issue, adjust power output, and update firmware makes this radio a compelling choice for the dedicated hobbyist.
If the radio displays "------" or random numbers, the PLL has lost lock.
Hold the PTT key and rotate the Channel Selector knob to increase or decrease values. anytone at5555n ii service menu updated
Accessing the service menu allows modification of transmit frequencies, power output, and deviation limits. In many jurisdictions, operating this radio on frequencies outside the 10-meter amateur band (28.000–29.700 MHz) without the appropriate license is illegal. Furthermore, improper adjustment of alignment parameters (such as TX power or PLL voltage) can result in hardware damage, RF burns, or interference with emergency services. Proceed at your own risk.
The AT-5555N II has within its service menu. Altering these without a clear purpose can easily degrade performance or "screw up a radio". The "updated" Service Menu of the AT-5555N II
: Press and hold the [MENU] and [MODE] buttons simultaneously while turning the radio on.
On previous AnyTone 5555 series radios, the service menu was often entered by: Hold the PTT key and rotate the Channel
Ultimate Guide to the AnyTone AT-5555N II Service Menu The AnyTone AT-5555N II is a powerhouse in the world of high-power 10-meter radio transceivers. While the standard user menu allows you to change basic operational settings, the hidden service menu grants you access to deep hardware calibrations. Accessing this menu allows you to fine-tune your radio’s power output, modulation, and frequency alignment without opening the physical case.